linux-kernel - [PATCH v1 36/54] dm-crypt: don't clear bvec->bv_page in crypt_free_buffer

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Date:   Wed, 28 Dec 2016 00:04:45 +0800
From:   Ming Lei <tom.leiming@...il.com>
To:     Jens Axboe <axboe@...com>, linux-kernel@...r.kernel.org
Cc:     linux-block@...r.kernel.org, Christoph Hellwig <hch@...radead.org>,
        Ming Lei <tom.leiming@...il.com>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>,
        dm-devel@...hat.com (maintainer:DEVICE-MAPPER (LVM)),
        Shaohua Li <shli@...nel.org>,
        linux-raid@...r.kernel.org (open list:SOFTWARE RAID (Multiple Disks)
        SUPPORT)
Subject: [PATCH v1 36/54] dm-crypt: don't clear bvec->bv_page in crypt_free_buffer_pages()

The bio is always freed after running crypt_free_buffer_pages(),
so it isn't necessary to clear the bv->bv_page.

Signed-off-by: Ming Lei <tom.leiming@...il.com>
---
 drivers/md/dm-crypt.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 7c6c57216bf2..593cdf88bf5f 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1042,7 +1042,6 @@ static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone)
 	bio_for_each_segment_all(bv, clone, i) {
 		BUG_ON(!bv->bv_page);
 		mempool_free(bv->bv_page, cc->page_pool);
-		bv->bv_page = NULL;
 	}
 }
 
-- 
2.7.4